I like your approach to True/False questions. I agree that sometime with True/False or Multiple Choice it is sometimes a guessing game/playing the odds for some students. However, these questions can be helpful when students receive a lot of information. For example, we use online drills for students and they need to receive over 90% before they move on to the next topic; they are presented in a Multiple Choice format. If the student needs to know the information more in depth or know the difference between two topics then the True/False method you described or fill-in would be more suitable.
